Avoid warnings from Julia 0.7 in src/pytest.jl

Author: tkf

src/pytest.jl

@@ -1,6 +1,6 @@
 #!/usr/bin/env julia
 
-"""
+#=
 CLI to run pytest within Julia process.
 
 All arguments are passed to pytest.
@@ -11,7 +11,7 @@ Examples:
     ./pytest.jl
     ./pytest.jl -x --pdb
     ./pytest.jl replhelper/tests/test_ipyext.py
-"""
+=#
 
 using IPython
 code = IPython.test_replhelper(